BT-13s in flight line in United States. Men stand nearby. The BT-13 engine started. It takes off. The aircraft in flight. Trees in the background.
Line of semi-finished BT-13's at Vultee Aircraft Plant in United States. Airplanes in construction. Men work on the semi-finished aircraft.
BT-13's on an airbase in United States. Other vehicles on the airbase. Men stand near the aircraft. Hangar and trees in the background. A BT-13 takes off. The aircraft in flight.
Line of BT-13's in United States. Civilians examine the aircraft. Pilot examines the aircraft. Hangar in the background. Trees in the background.
Semi-finished BT-13's inside the Vultee Aircraft Plant in United States. A welder at work on engine mount. Riveters at work. Line of BT-13's. Men work under wing of BT-13. Row of wings of BT-13's. Man works on tail wheel of BT-13.
Insects infest crops in various parts United States. Insects such as boll weevil and the corn borer. People work in a farm. Boll weevil attacks cotton. European crop borer destroys crop. Brown tail and gypsy moths are a menace to fruits, shade and forest trees. Wrecked forest trees. Products examined before shipment.
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